A class contains reference to Application and View which are needed by external command.

Namespace: Autodesk.Revit.UI
Assembly: RevitAPIUI (in RevitAPIUI.dll) Version: 24.0.0.0 (24.0.0.0)

Syntax

C#
`public class ExternalCommandData : APIObject`

Visual Basic
`Public Class ExternalCommandData _ Inherits APIObject`

Visual C++
`public ref class ExternalCommandData : public APIObject`

Inheritance Hierarchy

SystemObject
Autodesk.Revit.DBAPIObject
Autodesk.Revit.UIExternalCommandData